Multiple muffler and control therefor



N. H. HASSEL. MULTIPLE MUFFLER AND CONTROL THEREFOR. APPLICATILON FILEDJUNE 10, 1919. 7

1,332,663. Patnfed Man. 1920.

UNITED STATES PATENT OFFICE.

NELS H. mssnn, or BEVERLY HILLS, CALIFORNIA.

MULTIPLE MUFFLER AND coN'rnoL THEREFOR.

v Specification of Letters Patent.

Patented ManZ, 1920.

Application filed .Tune 10, 1919. Serial No. 303,494.

To all whom it may concern:

Be it known that I, New I-I. HASSEL, a citizen of the United States,residin at Beverly lowing is a specification.

Hills, in the county of Los Ange es, State of California, have inventeda new and useful Improvement Comprising Multiple Mufliers and ControlsTherefor, of which the fol- My invention relates to internal combustionengines and more particularly .to engines having eight or morecylinders. In all internal combustion engines used in automobiles it iscommon practice to provide a muffler in the exhaust pipe for the purposeof mufiiing or, deadening the noise of the explosion. 'Where a singlemuffler is so used considerable back pressure develops, which detractsfrom the power of the engine so that it is common practice to provide amufiler cut-out which is opened when it is necessary to call upon theenglne for extra power. These mufller cut-outs are ob]ec-.

.tionable in that the engine makes a lot of noise when they are open,and the use of cutouts is restricted by law in certain locali-' Ycylinder have suflicient time to expand before more hot gases fromanother cylinder are introduced so that comparatively little backpressure is produced.

Further objects and advantages will be made evident hereinafter.

Referring to the drawings, which are for illustrative purposes only,

Figure 1 is a side elevation partly in section showing an embodiment ofmy inven-. tion.

Fig. 2 is a section on a plane represented by the line 2-2 of Fig. 1. IFig. 3 is a section on a plane represented by the line 3-3 of Fig. 1.

Fig. 4 is a section through the connection getween the valve crank andits operating In the embodiment of my invention shown inthese drawings'a portion of an eightcylinder engine is shown, this engine havingexhaust opening 11, to which is secured by means of bolts 12 exhaustconduits 13.

These exhaust conduits extend downwardly and are pro\ ided with aplurality of small holes 14 around the periphery thereof, the bottom ofthe conduit 13 being open. Se- 'cured about the lower portion of theconduit '13 is a cylindrical diaphragm 15, also having a lurality ofsmall holes 16 therein. Surrounding the diaphragm 15 is a shell 17 whichis tightly secured at 18 to the conduit '13, and which is provided witha tight bottom 19, which is secured by .means of a flange 20 to a shortpipe 21, which is secured in an exhaust pipe 22." Closing the opening inthe bottom of the conduit 13 is a valve 23, which is pivoted on ashaft24:, provided with a crank 25. All of the cranks 25 are secured to anoperatin bar 26 by'means of a thumb screw 27 whichpassesthroughaloose-cushion 28. The operating bar 26 may be operated from thedash of the car by any convenient means not shown, to open and closethev valve 23.

The method of operation is as follows:

The valve being normallyclosed as shown in Fig. 1, the engine isstarted, each cylinder exhausting through its conduit 13.

The hot gases from the conduits 13 when the valves 23 are closed, passsuccessively through the openings 14 and 16, the rate." of expansionthrough the different open:

ings difleriiig slightly, so that in the place of a short sharp noise,due to the sudden expansion, thisnoiseis spread over a considerabletime, with the result that'itis not noticeable. By providing a pluralityof mufliers a cushion is provided on each cylinder and the amount ofback pressure is very greatly reduced. In addition it" is possible, bydisconnecting the thumb nuts 27 to allow one..cylinder to.dischargedirectly b opening its valve 23 so that the.

noise 0 this cylinder can be listened to apart from the others, which isof great assistance in determining I the performance of the engine, andlocating trouble .m any exhaust gases.

A further advantage of my invention is that even with the valves 23'open that the engine exhausts into a regular exhaust pipe 2-2, so thatthe gases are carried back to the rear of the machine and not releasedunder the floor or under the hood of the engine.

I claim as my invention:

1. In combination with an internal combustion engine having a pluralityof c linders; a common exhaust pipe; a plurality of mufllers, eachmufiler being connected between one of said cylinders and said exhaustpipe; walls forming an unrestricted passage through each muffler; and aplurality of 1 valves, each valve closing one of said passa es.

In combination with an internal combustion engine'having a plurality ofcylinders; a common exhaust pipe; a plurality of mufiiers, each muflierbeing connected between one of said cylinders and said exhaust pipe;walls forming an unrestricted passage through each mufiier; a pluralityof valves, each valve closing one of said passages; and means by whichall of said valves can be simultaneously operated.

3. In an internal combustion engine having a plurality of cylinders,each cylinder having an exhaust opening on the side and externally nearthe top thereof; a common exhaust pipe parallel to the shaft of theengine and to one side and near the bottom thereof; and a series ofvertical mufliers each connected between one of said exhaust openingsand said exhaust pipe.

4. In an internal combustion engine having a plurality of cylinders,each cylinder having an exhaust opening on the side and externally nearthetop thereof; a common exhaust pipe parallel to the shaft of theengine and to one side and near the bottom thereof; a series of centralconduits each 'connected to one of said exhaust openings and extendingvertically downward above said exhaust pipe, said conduits each beingperforated to allow gas to escape therethrough; a series of shells eachtightly secured around said conduit and having'a single opening:connected to said exhaust pipe; a series of valves each normallyclosing the bottom of said conduit and thus shutting off directconnection between said conduit and the interior of said shell; a seriesof cranks each arranged to operate one of said valves; and a commonconnection through which all of said cranks may be operated.

In testimony whereof, I have hereunto set my hand at Los Angeles,California, this 4th day of June, 1919.

NELS H. HAss EL.

